Look back at terrorism in America

Dzhokhar Tsarnaev, the man charged with the terror attack near the finish line of the 2013 Boston Marathon, went on trial Monday in a federal courthouse less than two miles from where two bombs, concealed in backpacks, exploded with devastating force. Take a look at the history of other attacks on American soil.

Hillary Clinton's office said "nothing nefarious was at play" when the former secretary of state used her personal email address, rather than one provided by the State Department, during her four years as America's top diplomat.